
Concept explainers
(a)
Interpretation: An equality and two conversion factors for Person G’s serum iron level should be written.
Concept Introduction: In humans, the normal range for serum iron is 80 to 160 mcg/dL.The low value of iron from this standard value indicates the deficiency of iron that is cause of anaemia.
(a)

Answer to Problem 2.89FU
Equality must be: 42 mcg of iron = 1 dL of blood
Conversion factors are:
42 mcg iron1 dL blood= 1 dL blood42 mcg iron
Explanation of Solution
During the doctor visit of Person G; he complained about feeling tired. The blood test showed the level of iron indicates 42 mcg/dL that is low compare to permissible value of iron blood. It indicates the iron deficiency in Person G that may cause anaemia.
Thus, the equality must be: 42 mcg of iron = 1 dL of blood
An arithmetical multiplier which is used for converting a quantity expressed in one unit into another equivalent set of units is said to be conversion factor.
So, the conversion factors are:
42 mcg iron1 dL blood= 1 dL blood42 mcg iron
(b)
Interpretation: The micrograms of iron present in the 8.0 mL of sample of Person G’s blood should be calculated.
Concept Introduction:An arithmetical multiplier which is used for converting a quantity expressed in one unit into another equivalent set of units is said to be conversion factor.
(b)

Answer to Problem 2.89FU
3.4 mcg
Explanation of Solution
Given Information:
42 mcg of iron = 1 dL of blood
Calculation:
42 mcg iron1 dL bloodx 1 dL blood0.1 L of blood x1 Lblood1000 mL blood= 42 x 10-2 mcg / mL 42 x 10-2 mcg1 mL x 8 mL1mL = 3.4 mcg
Thus, the iron level in Person G’s blood was found 42 mcg/dL hence in 8 mL; it will be 3.4 mcg.
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Basic Chemistry (5th Edition)
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